0.19.2 has been out for two and a half weeks now and though it's not a mission critical update, it is recommend for everyone "due to p2p network stability fixes". I think witnesses (especially the top ones) should take updating their nodes to the latest version seriously and do so promptly. To support that, I've removed my votes for versions lower than the latest stable release.
I hope to restore many of those votes once their nodes are updated as I have great respect for those witnesses and the benefits they provide to the community. As they say, "it's not personal," I just decided to make a statement about the importance of witnesses updating their nodes quickly and efficiently unless they communicate good reasons for not doing so.
If you'd like to update your votes as well, compare what you see here: https://steemd.com/witnesses
With your own witness votes here: https://steemd.com/@lukestokes (but use your own username)
For more on witness voting, see my weekly Witness Voting Engagement Report which comes out every Wednesday night.
Update: I'm happy to report three off the accounts I had previously voted for are back in as they upgraded to 0.19.2. :) Also, please see 
I'll continue to post about the process of witness voting, and I thank you all for your questions and desire to keep Steem running smoothly.
